Blower fob fuknaces



UNITED STATES PATENT OFFICE.

BENJ. L. JOHNSON, OF OASSAWAGO, PENNSYLVANIA.

BLOWER FOR FURNACES, &C.

Specification of Letters Patent No. 5,498, dated April 4, 1848.

To all lwhom t may concern:

Be it known that I, BENJAMIN L. JOHN- soN, of the town of Cassawago, in the county of Crawford and State of Pennsylvania, have invented a new and useful Improvement in Rotary Bellows; and I do hereby declare that the following is a full and exact description of the same, reference being had to the annexed drawing, forming part of this specilica-tion, in whicha is a frame supporting shafts of a driving wheel b. 0 is a flange on said wheel on which the ascending stepping of a dog shall form the mot-ive power.

d cl are the fellies on wheel.

e is a frame nearly vertical fixed in frame a supporting shafts of two pulley wheels f and g. Around f the belt h is carried from driving wheel b in the manner more fully shown on perspective View and returning wraps the pulley g, thereby securing the action of the belt on more than half the circumference of said pulley g. 'To the shaft of g is attached a wheel i around which a belt is carried that communicates and gives revolution to shaft j of fan wheel lc. The wings Z of this wheel are of novel construction, being long and narrow, forming one of the peculiar advantages of my improvement.

m is a fan case from which the inclosing face n can be removed.

0 0 are partitions of tin or sheet iron forming narrow passages through which the air enteringat draft hole p is forced at three points 1, 2 and 3 toward theoutlet or nozzle g.

1 is the frame supporting fan shaft and case wheel is separate from the other part of the machine, and removable any Where within range of communication from Wheel z'.

The machine may be varied in size, but a convenient one for blacksmithing may be made of the following proportions, viz., the driving wheel b eight feet in diameter, the pulley f 10 inches in diameter, the pulley g 6 inches in diameter, the wheel i 2 feet 3 f scroll commencing at 3 may gain 1 inch in going around to the same place.

The advantages resulting over my former rotary bellows resulting from my improvement is to obtain an increased blast with the application of equal power in consequence of the construction of the passages inclosed by the scroll partitions and the formation of the fan wings.

I do not claim the invention of an original rotary bellows.

That I do claim as my invention and desire to secure by Lett-ers Patent is- The formation of the passages above described and new mode of constructing the fan wings combining with the same to secure the advantage before mentioned.

BENJAMIN L. JOHNSON.

Witnessesz a T. R. JOHNSON, HIRAM BRADLEY, 

